Weekend Guide: Free Music, Some South Side Johnny and a Rubber Ducky Splash Down

Free Concert | Friday Night Live: Dan Haas Band
Pop rock band will give a free concert at Rockville Town Square. 6:30-9:30 p.m. Friday, Sept. 27. >>>See: RockvilleTownSquare.com 

Fundraiser | 2013 Duck Splash Festival
Watch 10,000 rubber ducks get plucked out of the lake for prizes for this Arc of Montgomery County fundraiser. 11 a.m.-4 p.m. Saturday, Sept. 28. The “splashdown’ starts at 3 p.m. Lakefront at Washingtonian Center, Gaithersburg. >>> See: DuckRace.com/Montgomery. 

Music | South Side Johnny & The Fools
South Side Johnny & The Fools opens BlackRock’s 2013-14 season with a concert 8 p.m. Saturday, Sept. 28 at BlackRock Center for the Arts in Germantown. Tickets: $42. >>>See: BlackRockCenter.org. 

Indie Film | ‘Shored Up’
Film explores what happens when we ignore the realities of geology in our drive to inhabit and profit from our coastlines. 4 p.m. Sunday, Sept. 29, BlackRock Center for the Arts, Germantown. Tickets: $8. >>>See: BlackRockCenter.org.

Bike | 5th Annual Montgomery County Farm Tour and Picnic
An autumn bike ride through the Montgomery County Ag Reserve. Sunday, Sept. 29. Moderately hilly routes of approximately 17, 25, 35, 55 and 75 miles will depart from Poolesville Golf Course. Co-hosted by Potomac Pedalers and Montgomery Countryside Alliance. Deadline for picnic has passed, but riders are still welcome. >>> Details: PotomacPedalers.org.